快刀伺服控制器设计中的信号完整性问题研究

Research of SI problems in the designing of FTS controler

在快刀伺服(FTS,Fast Tool Servo)控制器设计过程中,其中的核心技术单元包括电压反馈、位移反馈以及高频模拟电压信号控制全部基于具有高速数据总线的ADC或DAC实现,如果信号完整性问题处理不好就会对控制器的性能造成不良影响。为了使快刀伺服控制器具备良好的信号完整性,本文基于Hyperlynx仿真软件,对快刀伺服控制器中的核心器件(FPGA、模数转换器ADS1602以及数模转换器DAC9881)和关键信号路径的信号完整性问题进行了详细的分析和仿真研究,得到了量化的信号完整性改善方法和措施,为实际的控制器电路设计提供了有价值的理论依据和指导。

In the process of FTS controller design ,The key technologies including Voltage feedback and The displacement feedback and High frequency analog voltage signal control ,all these are realized based on ADC or DAC with High speed data bus . The controller performance Will be affected by the bad if the problems of signal integrity （SI） can＇t be solved vellwell.In order to achieve nicer SI performance ,the SI problems for the core devices and the key signal path wereanalysed and researched In the simulation methods using software Hyperlynx in this paper. Research results can providedsome valuable references and guidance for The actual circuit design process .